Have a saved game file from Dragon Age: Origins to unlock the Blood Dragon armor.

Sir Isaac's armor

Create an EA account, then link it with your PSN ID. Play Dead Space 2, and log into your EA account. Exit, then play Dragon Age 2. Look in the special delivery chest at your house to find Sir Isaac's armor.

Infinite money and experience

Successfully complete any side quest that does not activate a cutscene when receiving your reward (for example, the "South-Song" Gerralt's Corpse side quest or any "Find And Deliver" side quest), then save the game. Draw your weapon, and approach the NPC. While your character is putting away their weapon to talk to the NPC, rapidly press X to get unlimited money and EXP. You can keep doing this until you move your character. Repeat this as many times as desired. Note: This glitch was done on an unpatched version of the game.

Infinite money

Put your most expensive item in the "Junk" menu under the inventory menu. Go to any store, and select the "Sell" option. Select that item from the "Junk" menu to sell it, and then immediately and quickly press Triangle, X. Try to press Triangle and X almost simultaneously, but press Triangle just before X. This may require practice. It also works best if you do not have any other items in your "Junk" other than the item you are going to sell. Your item should be sold twice. Then, go to "Buy", buy the item back from the "Junk" menu, and then sell it again. Repeat this as many times as desired. Note: Make sure you do not leave the store after you have sold items, as they will not appear in the store again. This glitch was done on an unpatched version of the game.

Duplicating items

You must have two of the same item for this glitch to work. Place the items to be duplicated in the "Junk" menu under the inventory menu. Go to any store, and select the "Sell" option. Sell at least one of the items. The vendor must have at least one of the items listed in his "Junk" menu for this to work. Then, quickly press Triangle, X to sell them the remaining item in your "Junk" menu. Try to press Triangle and X almost simultaneously, but press Triangle just before X. This may require practice. It also works best if you do not have any other items in your "Junk" other than the item you are going to sell. This essentially duplicates the sold item, creating a third out of your existing two. You can use this duplication glitch to work with larger quantities of items, doubling the overall amount of items sold. Repeat this as many times as desired. Note: This glitch was done on an unpatched version of the game.

Easy attributes and skills

Acquire at least two of each of the Potion Of The Mortal Vessel, Potion Of Arcane Technique, and Potion Of Physical Technique. Then, use the "Duplicating items" glitch to duplicate the potions to easily boost your character's attributes and skills.

Infinite ability points

Obtain as many "Makers Sigh" potions as possible. Then, assign all your available abilities to your tactics menu. Next, use a "Makers Sigh" potion, then save the game. Load your saved game file, and go into the ability menu. The abilities you assigned to your tactics will be unlocked, but you will still have all your unassigned ability points. Assign your points to other abilities, put them in your tactics menu, then repeat the process again. Repeat this as many times as desired. Note: This glitch also allows you to unlock certain abilities in classes without having to go through the entire skill tree.

Note: This glitch requires access to "The Black Emporium" downloadable content and money available to purchase the "Makers Sigh" potion that resets all ability points and attributes. Hawke comes preloaded with preset skills he will always retain; thus, when you use the "Makers Sigh" potion, save, and reload the saved game file, Hawke's abilities will be filled again. Do the following to get unlimited ability points. Use the "Makers Sigh" potion, then save the game. Load your saved game file, and you will now have the amount of ability points that were taken away and Hawke's abilities will be set back to the default levels. For a Rogue, it will be approximately four to five points in the Dual Wield tree. Use another "Makers Sigh" potion, and repeat the process as many times as desired.

Infinite armor points

This glitch can be done at any point in the game with Hawke and Aveline. Simply equip, un-equip, and then re-equip a shield. Your armor number/percent will continue to increase. Repeat this as many times as desired. Note: This glitch was done on an unpatched version of the game.

Infinite rival points

Successfully complete Sebastian's "Repentance" companion quest. Then, go back to the chantry. Do not talk with Sebastian; instead talk to the Grand Cleric. Keep selecting the "You're useless" dialog option to get +5 rivalry for Sebastian each time. Repeat this as many times as desired. Note: This glitch was done on an unpatched version of the game.

Easy maximum stats

To get unlimited attribute points, you must be in Act 3 and have the ability to craft the Rune of Valiance. Get any two different pieces of equipment with at least one rune slot. Craft a Rune of Valiance onto both, making sure the amount of attributes added to each item is different. Equip both items. Remove the one that adds the most attributes first, then remove the other. Not all the attributes from the rune will be removed, and it will be permanently added to your character. Keep equipping both items and removing both items to continue getting attribute points until they max out all stats at 100.

Activating sustainable abilities simultaneously

To activate sustainable abilities that are not meant to be activated together (for example, Control and Might for Warriors), activate a sustainable ability, and before it is finished casting, activate the other sustainable ability. It should activate them both, and you should get the effects of both. This works for all sustainable abilities that are not meant to be activated simultaneously.

Recommended party configuration

It is best to plan your party from the start. While planning character roles, remember "One to take it, one to deal, one to weaken, one to heal." You should have a damager, tank, entropist, and healer. This will ensure you have one member taking all the damage and bringing the attention away from the rest of the party. Have an entropist (probably Merrill) to weaken and demoralize the enemy, a healer to strengthen and maintain the party, and a damager to inflict the pain. This will ensure a well rounded party that covers all aspects of combat.

Weapon and shield locations

Successfully complete the indicated task or search the indicated location to find the corresponding weapon or shield:

Act 2: Carved Ironwood Buttons can be bought at Ilen's Crafts in Sundermount.

Act 2: Silver-Threaded Dalish Embroidery can be found during the "Top of Sundermount" quest.

Act 3: Halla Horn Buckles can be found during the "A New Path" quest.

Gifts:

Wooden Halla Carving can be bought in Act 2 at Ilen's Crafts in Sundermount.

Sylvanwood Ring can be found on the remains of the Thief Leader in Act 3 during the "A Murder of Crows" quest.

Sebastian

Class: Rogue

Recruitment: "The Exiled Prince" bonus downloadable content is required to obtain him. He is optional and can be acquired by completing the "Duty" quest in Act 1 and the "Repentance" quest in Act 2.

Can He Leave Your Party?: Yes, but only during "The Last Straw" quest.

Personality Conflicts: He does not like Anders.

Core Companion Quests: "Duty", "Repentance", and "Faith".

Armor upgrades:

Act 2: Enchanted Articulation can be bought at the Armor Shop in Gallows Courtyard.

Act 2: Reinforced Bracers can be bought at Olaf's Armory in Hightown.

Act 2: Mail Undertunic can be found during the "Repentance" quest.

Act 3: Protection of the Faith can be found during the "Best Served Cold" quest.

Gifts: Starkhaven Longbow can be found in Act 2 during the "Repentance" quest.

Varric

Varric carries a fixed weapon, the Biance, which is a crossbow that increases in power as he gains levels. He is an archer that can offer a potent combination of AoE assaults and debilitating attacks that give your party a unique tactical edge.

Class: Rogue

Recruitment: He is mandatory and joins your party at the start of Act 1.

Can He Leave Your Party?: No.

Personality Conflicts: None, as he works well with everyone.

Core Companion Quests: "Family Matter" and "Haunted"

Armor upgrades:

Act 1: Inscribed Leather Harness can be bought at the Apparel Shop in Lowtown.

Act 2: Coat Lining with Concealed Pockets can be bought at Shady Merchandise at the Docks.

Act 2: Silverite-Reinforced Buckles can be found during the "Family Matter" quest.

Act 3: Drakeskin Leg Straps can be found during the "Finding Nathaniel" quest.

Gifts: The Tethras Signet Ring can be found in Act 2 during the "Trinkets Emporium in Lowtown" quest.

Jade Empire reference

During a random conversation between Fenris and Varric, Fenris asks him "Who is Bianca?" When Varric tells him it is a crossbow, Fenris says that he must have named it after someone, to which Varric replies, "Nope, Mirabelle was taken", a reference to the rifle owned by Sir Roderick Von Fontlebottom, The Magnificent Bastard from Jade Empire.

Joss Whedon reference

During random companion dialogue between Anders and Isabella in the city, she mentions that abominations are easy to escape because they make loud noises like "Grr Argh", which Anders refutes saying "Abominations do not go Grr Argh." During the ending credits of Buffy The Vampire Slayer, Joss Whedon's "Mutant Enemy Productions" credit screen shows a little monster which says "Grr Argh?"

Sir Mixalot reference

Take Isabella into the fade in the desire section. The demon will seduce her with the prospect of a boat in the harbor. When Isabella turns on you, she will say "I like big boats and I cannot lie", which is a reference to Sir Mixalot's "I Like Big Butts" song.

The Mask reference

In the "Prime Suspect" quest when you meet Mr. Dupries, have Varric in your party. Give the sarcastic response of letting Dupries talk his way out the situation. Varric will make the comment "I bet 20 silver it's 'it wasn't me, it was the one-armed man'". This is a reference to The Mask when Jim Carey tries to defend his innocence when he gets captured.

Wizard Of Oz reference

In your home when your mother says that her children should be nobles now, your uncle says "And if wishes were poppy we'd all be dreaming right now."

Easy "Chantry Historian" trophy

Trophies

Successfully complete one of the following tasks to get a trophy:

Talented (Bronze): Upgraded a spell or talent.

Tag Team (Bronze): Used teamwork to perform a cross-class combo.

That Thing Has Legs (Bronze): Found and killed a varterral.

Exorcist (Bronze): Found and killed the undying Xebenkeck.

Weapon Master (Bronze): Mastered a weapon style.

Craftsman (Bronze): Acquired your first crafting recipe.

Financier (Bronze): Became a partner in a Deep Roads expedition.

Dedicated (Bronze): Reached Level 10.

A Friend in Need (Bronze): Upgraded the armor of one of your party members.

Enchanter (Bronze): Enchanted an item.

Mogul (Bronze): Had 100 or more sovereigns in your purse.

Specialized (Bronze): Took two class specializations.

I Got Your Back (Bronze): Completely upgraded the armor of one of your party members.

Immigrant (Bronze): Became a resident of Kirkwall.

Delver of the Deep (Bronze): Explored the Deep Roads.

Birthright (Bronze): Kicked the slavers out of your ancestral mansion.